AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P2769, P2770

DTC Code DTC Name
P2769 Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)
P2770 Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL)

DESCRIPTION

By turning the shift solenoid valve SL ON or OFF, the TCM controls the fluid pressure to the lock-up relay valve, performing lock-up control.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2769 Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) While the lock-up is operating, a short is detected in the shift solenoid valve SL circuit 1 time or more consecutively (2 trip detection logic).

  • Shift solenoid valve SL

  • Transmission wire

  • Harness and connector

  • TCM

 Comes on DTC stored
P2770 Open in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) While the lock-up is operating, an open is detected in the shift solenoid valve SL circuit 1 time or more consecutively (2 trip detection logic).

  • Shift solenoid valve SL

  • Transmission wire

  • Harness and connector

  • TCM

 Comes on DTC stored

Fail-safe function:

If the TCM detects a malfunction, it turns the shift solenoid valve SL OFF.

MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the TCM sends a signal to the solenoid valve SL to regulate the hydraulic pressure and provide smooth torque converter assembly engagement. The shift solenoid valve SL responds to commands from the TCM and controls the lock-up relay valve to perform the torque-converter lock-up function. If the TCM detects an open or short circuit in the shift solenoid valve SL circuit, it will illuminate the MIL and store a DTC.

WIRING DIAGRAM

A01Q9ZOE43
*1 Shift Solenoid Valve SL
*2 Transmission Wire

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced.

Click here

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Perform the Lock-up Function in Road Test.

    Click here

  2. Turn the engine switch off.

  3. Perform step (1) again.

  4. Check for DTCs again.

    Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL) - TCM)


    1. A01QADTC54
      *a

      Rear view of wire harness connector

      (to TCM)

      Disconnect the E5 TCM connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E5-24 (SL) - Body ground 20°C (68°F) 11 to 15 Ω
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here

    OK

  2. REPLACE TCM


    1. Replace the TCM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM A/T CODE REGISTRATION Click here

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. Disconnect the E24 transmission wire connector.

    2. Disconnect the E5 TCM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E24-7 (SL) - E5-24 (SL) Always Below 1 Ω
      E24-7 (SL) or E5-24 (SL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - TCM)

    OK

  4. INSPECT SHIFT SOLENOID VALVE SL


    1. B002CUTC01
      *a Shift Solenoid Valve SL

      Remove the shift solenoid valve SL.

      Click here

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Terminal of shift solenoid valve SL connector - Shift solenoid valve SL Body 20°C (68°F) 11 to 15 Ω

    3. Connect a positive (+) lead from the battery to the terminal of the solenoid valve connector, and a negative (-) lead to the solenoid body. Check that the valve moves and makes an operating sound.

      OK
      Valve moves and makes an operating sound.
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE SHIFT SOLENOID VALVE SL Click here